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Device and method for producing stannic oxide through self-heating way

A technology of tin dioxide and self-heating method, applied in the direction of tin oxide, etc., can solve the problems of high technical requirements, high relative cost, high equipment investment, etc., and achieve the effect of improving product quality, stable and reliable equipment operation, and ensuring purity

Active Publication Date: 2013-03-13
LANZHOU ENG & RES INST OF NONFERROUS METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device for producing tin dioxide by autothermal method to solve the technical problems of high technical requirements, high equipment investment and high relative cost in the production of tin dioxide by gasification

Method used

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  • Device and method for producing stannic oxide through self-heating way
  • Device and method for producing stannic oxide through self-heating way
  • Device and method for producing stannic oxide through self-heating way

Examples

Experimental program
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Effect test

Embodiment 1

[0040]The steps are as follows: move the autothermal oxidation furnace 1 to the ambient cooling dust collection system 2, turn on the centrifugal fan 14 of the ambient cooling dust collection system 2, align the smoke exhaust port 7 with the fume hood 11, and use natural gas to heat up to 1200°C. Add tin ingots from the feeding port 6 to start melting, observe the height of the tin liquid from the operating port 9 to 300mm, then the furnace temperature drops to 1000°C, continue heating to the furnace temperature of 1200°C, stop heating, and move the autothermal oxidation furnace 1 Go to the main process cooling dust collection system 3, make the main process hood 15 dock with the smoke exhaust port 7, open the main process centrifugal fan 20, slowly lower the spray gun 4, insert it into the self-heating oxidation furnace 1 from the spray gun hole 8, and pass it into For primary air and fuel, insert the secondary air pipe 5 into the secondary air port 10 to blow secondary air; o...

Embodiment 2

[0043] Move the autothermal oxidation furnace 1 to the ambient cooling dust collection system 2, turn on the centrifugal fan 14 of the ambient cooling dust collection system 2, align the exhaust port 7 with the fume hood 11, use natural gas to heat up to 1211°C, and 6. Add tin ingots and start melting. Observe the height of the tin liquid from the operating port 9 to 320mm. At this time, the furnace temperature drops to 1000°C, continue heating to the furnace temperature of 1280°C, stop heating, and move the autothermal oxidation furnace 1 to the main process Cool the dust collection system 3, make the main process fume hood 15 dock with the smoke exhaust port 7, turn on the main process centrifugal fan 20, lower it slowly, insert the spray gun 4 from the spray gun hole 8 into the autothermal oxidation furnace 1, and pass in primary air and fuel , insert the secondary air pipe 5 into the secondary air port 10 to blow the secondary air; open the primary air pipe valve and the se...

Embodiment 3

[0045] Move the autothermal oxidation furnace 1 to the ambient cooling dust collection system 2, turn on the centrifugal fan 14 of the ambient cooling dust collection system 2, align the exhaust port 7 with the fume hood 11, use natural gas to heat up to 1230°C, 6 Add tin ingots and start to melt. Observe the height of the tin liquid from the operating port 9 to 280mm. At this time, the furnace temperature drops to 1000°C, continue heating to the furnace temperature of 1240°C, stop heating, and move the autothermal oxidation furnace 1 to the main process Cool the dust collection system 3, make the main process fume hood 15 dock with the smoke exhaust port 7, turn on the main process centrifugal fan 20, lower it slowly, insert the spray gun 4 from the spray gun hole 8 into the autothermal oxidation furnace 1, and pass in primary air and fuel , insert the secondary air pipe 5 into the secondary air port 10 to blow the secondary air; open the primary air pipe valve and the seconda...

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Abstract

The invention discloses a device and a method for producing stannic oxide through a self-heating way, solving the technical problems that the method for producing stannic oxide in a gasifying way is high in technical requirement, high in equipment investment and relatively high in cost. The device comprises a self-heating oxidizing furnace, wherein a smoke outlet, a spray gun hole and a secondary air port are formed on the top of the self-heating oxidizing furnace; and a feed inlet is formed on the sidewall of the self-heating oxidizing furnace. The method comprises the following steps in sequence: melting the metallic tin ingots into molten tin; oxidizing the metallic tin into stannous oxide to be evaporated in a reaction area by primary air; and oxidizing stannous oxide into stannic oxide in the same furnace by secondary air. According to the method, the reaction heat produced in the oxidizing process is utilized, so that the production can be carried out by self-heating, and no any fuel is added; and besides the fuel is just needed to be used for heating to smelt the tin ingots during blowing in, any fuel is not needed in the production process, and the equipment is stable and reliable in running, so that the self-heating melting is really realized, and the granularity, purity and whiteness of stannic oxide can meet the requirements, and the slag can be recycled without increasing the amount.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and in particular relates to a device and a method for producing tin dioxide by an autothermal method. Background technique [0002] Tin dioxide is widely used in the production of electrode materials, conductive oxide films, glass industry, electronics industry, and ceramics industry. [0003] At present, the production of tin dioxide mainly includes wet method and fire method. The wet method is mainly nitric acid method, which consumes a lot of nitric acid, causes serious environmental pollution, high tin consumption and low product purity. In addition, there are sol-gel method, gel-combustion method, chemical precipitation method, etc. to produce nanometer tin dioxide. The fire method is mainly the gasification method, also known as the arc gasification synthesis method, which was successfully tested as early as 1958. After further improvement, it has become the main method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02
Inventor 陈正刘彪萧子良刘华利陈金明
Owner LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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